The U.S. Supreme Court's 6–3 decision on February 20, 2026 was, on its surface, a legal question — does the International Emergency Economic Powers Act (IEEPA) authorize the President to impose tariffs? Underneath that surface, however, the ruling is best read as a multi-layered political game. Behind nine justices' votes lies an intertwining of partisan calculation, judicial philosophy, and the separation of powers.
The 6–3 split does not mean "six anti-Trump votes." It means "six votes that the executive had overreached." The liberal justices opposed Trump himself; the conservative majority invoked the major questions doctrine to constrain executive power. Two very different motives converged on the same opinion — but for entirely different jurisprudential reasons.
I. The Full Tableau: The Voting Logic of Nine Justices
| Camp | Justices | Stance | Legal Basis | Real Calculation |
|---|---|---|---|---|
| Liberals | 3 | Against IEEPA | Textualism: the statute does not authorize | Opposition to Trump |
| Conservatives (majority) | 3 (incl. Roberts) | Against IEEPA | Major questions doctrine: clear congressional authorization required | Constraining executive power + laying groundwork for the Court |
| Conservatives (dissent) | 3 | For IEEPA | Historical delegation + textual analysis | Defending Trump + institutional conservatism |
The subtlety: the conservative side split — three votes for Trump, three votes for Congress. The eventual 6–3 does not mean "six anti-Trump votes." It means "six votes that the executive had overreached."
II. The Liberal Justices' Strategy: Stick to Text, Avoid Doctrine
The liberal justices' position is comparatively straightforward: already opposed to Trump, they narrowed in on the text — IEEPA contains no word for "tariff," so the President has no authority. They deliberately avoided the major questions doctrine, because that weapon might later be wielded by conservatives to strike down Democratic administrations' policies.
If liberals do not hand conservatives an additional weapon today, they need not worry tomorrow about that weapon being used to cut into their own agenda.
III. The Conservative Majority's Three Calculations (Including Roberts)
Three conservative justices — including Chief Justice John Roberts — invoked the major questions doctrine to rule IEEPA unlawful. Three layers of consideration sit behind that move:
First, Constraining Executive Power
At the core of conservative judicial philosophy lies the imperative to "constrain executive power and return to congressional primacy." Trump's use of IEEPA to bypass Congress and reconstruct the trade system counted, in their eyes, as executive overreach.
Second, Finding a Dignified Justification
They could neither target Trump personally nor be labeled a "partisan tool." Lifting the question to the constitutional plane and invoking the major questions doctrine — tariffs are a major matter, the taxing power belongs to Congress, please reconsider — achieved the objective while preserving institutional dignity.
Third, Laying Groundwork for the Future
The major questions doctrine is an important tool for limiting future liberal presidents' expansion of executive power. Use this blade on Trump today, and tomorrow it can cut into a Democratic administration's policies.
The Divide From the MAGA Line
Tu Zhuxi singles out the deeper fault line: the conservative justices' opposition to Trump's IEEPA tariffs also marks a fundamental break with the MAGA movement. Conservative jurists want to constrain executive power and return to the rule-of-law framework; the MAGA movement, by contrast, favors maximalist executive power and bypassing establishment procedures.
Conservative judicial philosophy is at its core about constraining executive power and returning to congressional primacy. That is fundamentally different from those who want to push executive power to its maximum — the tech right and MAGA are not the same thing.
IV. Kavanaugh's Dissent — "Trump's Hero"
Justice Brett Kavanaugh — a Trump appointee — is the representative figure on the side backing IEEPA. His rebuttal runs along four lines:
- Logical inconsistency: If the President can prohibit all imports from a country outright, why can he not impose a tariff? "That makes no sense."
- "Foreign vs. domestic": In foreign affairs, the President can bomb and destroy other countries without the major questions doctrine applying — tariffs touch international trade and diplomacy, and the President wields broader authority there.
- Neutrality: A negative ruling from the Court has in fact already intervened in trade policy — this is "judicial overreach."
- Pragmatism: The ruling triggers massive refunds and chaos; the Court should not manufacture unnecessary disruption.
Kavanaugh also offered alternative statutory pathways on the spot — and Trump dubbed him "my hero."
V. The Ruling Creates More Problems Than It Solves
After the ruling landed, reactions across the board settled into the familiar pattern of "brief celebration followed by sustained anxiety":
- U.S. domestic constituencies: celebrating the return of the rule of law
- Foreign governments: welcoming the ruling
- And then immediately: everyone slipped into wait-and-see mode — will the new tariffs be challenged again? How to anticipate policy? How to handle the refunds?
The Supreme Court's ruling creates far more problems than it solves. Uncertainty has not been reduced — it has been magnified.